From 5097f01b7aabd7d00db70495bb9f12b29ca2d60e Mon Sep 17 00:00:00 2001
From: Florian Schmaus <flo@geekplace.eu>
Date: Tue, 11 Sep 2018 09:42:08 +0200
Subject: [PATCH] Make StreamOpen.toXML(String) 'null' aware

---
 .../main/java/org/jivesoftware/smack/packet/StreamOpen.java    | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/smack-core/src/main/java/org/jivesoftware/smack/packet/StreamOpen.java b/smack-core/src/main/java/org/jivesoftware/smack/packet/StreamOpen.java
index 21a4fce8e..b9a4a8bf9 100644
--- a/smack-core/src/main/java/org/jivesoftware/smack/packet/StreamOpen.java
+++ b/smack-core/src/main/java/org/jivesoftware/smack/packet/StreamOpen.java
@@ -100,6 +100,9 @@ public class StreamOpen implements Nonza {
         XmlStringBuilder xml = new XmlStringBuilder();
         xml.halfOpenElement(getElementName());
         // We always want to state 'xmlns' for stream open tags.
+        if (enclosingNamespace == null) {
+            enclosingNamespace = CLIENT_NAMESPACE;
+        }
         xml.attribute("xmlns", enclosingNamespace);
 
         xml.attribute("to", to);